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<head>
  <meta charset="UTF-8">
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  <title>Document</title>
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<body>
  <script>
    function makeSalary(base) {
      return function (performance) {
        return base + performance
      }
    }

    const s5 = 1000;
    const s6 = 2000;

    let A, B, C;

    const makeSalaryS5 = makeSalary(s5)
    A = makeSalaryS5(3000)
    console.log(A);

  </script>
</body>

</html>